and jennifer garner. and jason bateman. elmo loves to name-drop. >> clearly. >> he does. >> they were all dressed appropriately? >> always. it was wonderful. we had a great time with our celebrity friends. isn't that right? >> that's right. and a wonderful video song with will.i. will.i.am, right? >> yes. will.i.am. >> give us a little bit? ♪ ♪ la, la, la try something like that. >> we never got to do the song elmo slide. elmo will teach you how to dance, mr. george. >> robin's been trying. >> and elmo will be happy to dance. >> harper was very excited when i told her about this. she wanted your autograph. >> i will do that. >> you're only 3. >> it's okay. elmo uses a red crayon. okay. elmo will do it later. >> so great. >> later. >> yes. you're so anxious, mr. george. >> it is true. >> say hello to your wife, miss ali, too. >> i will. >> elmo loves you. >> how do you know his whole family? >> elmo loves to name-drop. >> you made me a hero at home today. thank you very much. >> really? >> yes. >> we're so happy about ou